Whitney Grant plan to sell securities of Sun Country Airlines Holdings, Inc. under Form 144

Whitney Grant filed Form 144 to notify SEC of plan to sell 2400 units of Sun Country Airlines Holdings, Inc. securities around 2025-12-22, with aggregate market value of $36,002.00. The total outstanding units is 52714634.0. The amount planned to be sold represents 0.00% of total outstanding units; Recent transactions in past 3 months include: On 10/02/2025, sold 279 units for $3261.85; On 11/26/2025, sold 623 units for $8204.91; On 12/02/2025, sold 5729 units for $80333.76; On 12/03/2025, sold 43620 units for $618304.78; On 12/10/2025, sold 365 units for $5475.00; On 12/11/2025, sold 5784 units for $86909.23; On 12/12/2025, sold 32482 units for $491741.75; On 12/15/2025, sold 100 units for $1500.50; On 12/16/2025, sold 4133 units for $62243.81; On 12/17/2025, sold 900 units for $13563.99; On 12/18/2025, sold 300 units for $4500.00;